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AS Jan 13.pdf


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Do not write
outside the
box

2
Section A
Answer all questions in the spaces provided.

1 (a)

State the meaning of the term mass number of an isotope.
............................................................................................................................................
............................................................................................................................................
............................................................................................................................................
(1 mark)

1 (b)

Give the symbol of the element that has an isotope with a mass number of 68 and has
38 neutrons in its nucleus.
............................................................................................................................................
(1 mark)

1 (c)

The following shows a simplified diagram of a mass spectrometer.

To vacuum pump
Q
Sample
Detector
P

1 (c) (i)

State what happens to the sample in the parts labelled P and Q.
P ........................................................................................................................................
Q ........................................................................................................................................
(2 marks)

(02)

WMP/Jan13/CHEM1